Network data keystone



FIG. 1 is a front view of the network data keystone showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines in the drawings depict portions of the network data keystone that form no part of the claimed design. 

CLAIM The ornamental design for a network data keystone, as shown and described. 